<template>
  <div>
    <el-form :inline="true" class="demo-form-inline" :model="cForm" :disabled="show">
      <el-form-item label="一级分类">
        <el-select placeholder="请选择" v-model="cForm.category1Id" @change="handler1">
          <el-option :label="c1.name" :value="c1.id" v-for="c1 in list1" :key="c1.id"></el-option>
        </el-select>
      </el-form-item>
      <el-form-item label="二级分类">
        <el-select placeholder="请选择" v-model="cForm.category2Id" @change="handler2">
          <el-option :label="c2.name" :value="c2.id" v-for="c2 in list2" :key="c2.id"></el-option>
        </el-select>
      </el-form-item>
      <el-form-item label="三级分类">
        <el-select placeholder="请选择" v-model="cForm.category3Id" @change="handler3">
          <el-option :label="c3.name" :value="c3.id" v-for="c3 in list3" :key="c3.id"></el-option>
        </el-select>
      </el-form-item>
    </el-form>
  </div>
</template>

<script>
export default {
  name: 'CategorySelect',
  props:['show'],
  data () {
    return {
      //一级分类的数据
      list1: [],
      // 二级分类的数据
      list2: [],
      // 三级分类的数据
      list3: [],
      // 收集相应的一级，二级，三级分类的id
      cForm: {
        category1Id: "",
        category2Id: "",
        category3Id: "",
      }
    }
  },

  methods: {
    // 获取一级分类的请求
    async getCategory1List () {
      let result = await this.$API.attr.reqCategory1List()
      if (result.code == 200) {
        this.list1 = result.data
      }
    },
    // 获取二级分类的请求
    async handler1 () {
      // 清除二三级option
      this.list2 = [];
      this.list3 = [];
      this.cForm.category2Id = '';
      this.cForm.category3Id = '';
      const { category1Id } = this.cForm;
      let result = await this.$API.attr.reqCategory2List(category1Id)
      if (result.code == 200) {
        this.list2 = result.data
      }
    },
    // 获取三级分类的请求
    async handler2 () {
      // 清空数据
      this.list3 = [];
      this.cForm.category3Id = '';
      const { category2Id } = this.cForm;
      let result = await this.$API.attr.reqCategory3List(category2Id)
      if (result.code == 200) {
        this.list3 = result.data;
      }
    },
    // 三级分类事件的回调
    handler3 () {
      this.$emit('getCategoryId', this.cForm);
    }
  },
  mounted () {
    // 获取一级分类的方法
    this.getCategory1List();
  }

}
</script>

<style scoped>
</style>